All Her Fault arrived on Peacock in November 2025, bringing together a cast of well-known actors to tell a tense suburban mystery. Led by Sarah Snook in her first major television role since Succession, the miniseries follows a mother’s desperate search for her missing five-year-old son. The cast includes both established stars and emerging talents, each playing characters whose secrets slowly surface as the investigation deepens.
The series, which received two Golden Globe nominations for Best Limited Series and Best Actress, features a compact ensemble that drives the narrative forward. Michael Peña, Dakota Fanning, and Jake Lacy join Snook in the main cast, while Sophia Lillis takes on a pivotal supporting role.
Who Is in the Main Cast of All Her Fault?
Sarah Snook (Marissa Irvine)
Michael Peña, Jake Lacy, Dakota Fanning
November 6, 2025 (Peacock)
Limited Miniseries (Season 1)
- Sarah Snook portrays Marissa Irvine, a self-made wealth manager whose world collapses when her son disappears.
- Dakota Fanning plays Jenny Kaminski, a marketing executive and fellow mother whose son was the playdate host.
- Michael Peña takes the role of Detective Jim Alcaras, the investigator assigned to Milo Irvine’s case.
- Jake Lacy appears as Peter Irvine, Marissa’s husband and a commodities trader.
- Jay Ellis plays Colin Dobbs, Marissa’s business partner and close friend.
- Abby Elliott portrays Lia Irvine, Peter’s sister who is recovering from addiction and living with the family.
- Thomas Cocquerel plays Richie Kaminski, Jenny’s husband and a high school teacher.
| Actor | Character | Description |
|---|---|---|
| Sarah Snook | Marissa Irvine | Wealth manager and mother searching for her missing son. Also executive producer. |
| Dakota Fanning | Jenny Kaminski | Head of marketing at Blackhorn; mother of Milo’s playdate friend. |
| Jake Lacy | Peter Irvine | Commodities trader supporting his recovering sister. |
| Jay Ellis | Colin Dobbs | Marissa’s best friend and business partner. |
| Abby Elliott | Lia Irvine | Peter’s sister living with the family while in recovery. |
| Michael Peña | Detective Jim Alcaras | Lead investigator; father to a nonverbal 13-year-old son. |
| Thomas Cocquerel | Richie Kaminski | Jenny’s husband and a high school teacher. |
| Sophia Lillis | Josephine “Josie” Murphy / Carrie Finch | 21-year-old nanny and prime suspect. |
| Kartiah Vergara | Ana Garcia | Marissa and Peter’s nanny. |
| Duke McCloud | Milo Irvine | Marissa and Peter’s 5-year-old son. |
| Johnny Carr | Detective Greco | Detective Alcaras’ partner. |
| Orlando Ivanovic | Sam Alcaras | Detective Alcaras’ 13-year-old nonverbal son. |
Who Plays Milo, Sam, and Sarah in All Her Fault?
The Missing Child: Milo Irvine
Duke McCloud portrays Milo Irvine, the five-year-old son of Marissa and Peter Irvine. Milo’s disappearance after a routine playdate sets the entire plot in motion. His character remains central to the investigation even as the story shifts focus to the adults around him.
Detective Alcaras’ Son: Sam
Orlando Ivanovic plays Sam Alcaras, the 13-year-old nonverbal son of Detective Jim Alcaras. The character has a developmental disability and is cared for by his father, adding a layer of personal complexity to the detective’s involvement in the case. This role is a supporting one, with limited screen time but narrative significance.
The character sometimes referred to as “Sarah” in online discussions does not appear to be a named role in the series. No official casting credits list a character called Sarah. It may be a conflation with actress Sarah Snook’s first name or a minor uncredited part.
Josie Murphy and Other Supporting Roles
Sophia Lillis plays Josephine “Josie” Murphy, also known as Carrie Finch, the 21-year-old nanny for the Kaminski family. She becomes the prime suspect in Milo’s disappearance. Her backstory is revealed through flashbacks throughout the season. Other supporting cast members include Laura Brent as Aimee Babich, Joey Vieira as Victor Beran, and Caroline Brazier and Erroll Shand as relatives of Josie Murphy.
When and Where Can I Watch All Her Fault (Season 1)?
All Her Fault premiered on Peacock on November 6, 2025. Some sources note November 7 depending on time zones. All episodes were released simultaneously in a full-season drop, consistent with the miniseries format. The series carries a TV-MA rating and consists of six to eight episodes.
The series is not available on Netflix or Sky in any known distribution deal. Peacock, NBCUniversal’s streaming service, is the exclusive platform for the United States. International availability remains unclear as of May 2026, with no official announcements regarding licensing agreements for other regions.
The production is led by Carnival Films, known for Downton Abbey, with executive producers including Minkie Spiro, who also directed, Megan Gallagher, who wrote the adaptation, and Andrea Mara, the author of the original novel. Sarah Snook also served as an executive producer on the project.
Minkie Spiro and Kate Dennis directed episodes of the series. The executive producer team includes Nigel Marchant, Gareth Neame, Joanna Strevens, Jennifer Gabler Rawlings, and Christine Sacani. This marks a notable collaboration between Carnival Films and Peacock.
What Is All Her Fault About and Is It Based on a True Story?
The plot follows Marissa Irvine, a self-made wealth manager, who drops off her five-year-old son Milo at a playdate for the first time. When she returns to pick him up, a stranger answers the door and denies knowing Milo or Marissa. The disappearance triggers a police investigation that unravels secrets among the parents, nannies, and neighbors of a Chicago suburb.
The story is not based on a specific true event. It is an adaptation of Andrea Mara’s 2021 novel of the same name, which is a work of fiction. The narrative employs domestic thriller conventions similar to The Undoing or Big Little Lies, focusing on maternal guilt, class tensions, and the hidden lives of families.
Will There Be an All Her Fault Season 2?
As of May 2026, no renewal for a second season has been announced. The series was produced and marketed as a limited miniseries with a complete story arc adapted from the novel. The Golden Globe nominations it received were in the Limited Series categories, which further supports the intended format.
There is no publicly available viewership data that would indicate whether Peacock considers extending the story. No spin-offs, additional seasons, or international licensing deals have been confirmed or reported by official sources.
Timeline: All Her Fault Production and Release
- 2024 — Production announced; casting begins for the adaptation of Andrea Mara’s novel.
- Mid-2025 — Full cast confirmed, including Sarah Snook, Michael Peña, Dakota Fanning, and Jake Lacy.
- November 6, 2025 — Premiere on Peacock in the United States.
- Late 2025 — Series receives two Golden Globe nominations for Best Limited Series and Best Actress.
- As of May 2026 — No renewal or additional distribution deals announced.
What Is Certain and What Remains Unclear?
| Established Information | Information That Remains Unclear |
|---|---|
| Sarah Snook plays Marissa Irvine. | Whether All Her Fault will be renewed for Season 2. |
| Michael Peña plays Detective Jim Alcaras. | Exact release dates for international markets outside the US. |
| Premiere date is November 6, 2025 on Peacock. | Whether the series will stream on Netflix or Sky in the future. |
| It is a TV miniseries adaptation of Andrea Mara’s novel. | Specific details about any real-life inspiration for the story. |
| Two Golden Globe nominations were received. | Viewership numbers and audience metrics. |
What Is the Background of All Her Fault?
All Her Fault is positioned as a high-profile thriller miniseries that capitalizes on the star power of Sarah Snook following her Succession success. The production pedigree from Carnival Films provides a strong foundation, and the casting of Michael Peña and Dakota Fanning adds mainstream appeal. The novel, written by Andrea Mara, was published in 2021 and was well-received in the domestic thriller genre. The television adaptation updates the setting to suburban Chicago, though the original novel was set in Ireland.
Where Do the Cast Details Come From?
The cast and character information for All Her Fault has been compiled from multiple sources. The IMDB page provides the full credits list with character names and episode appearances. The Wikipedia article offers production history and background on the novel adaptation. The official Sky Group press release confirms the main cast and premiere date, while ELLE’s cast guide provides character descriptions and visual details. Differences in character names across sources, such as Detective Alcaras versus McConville, remain unconfirmed.
Summary: Who Stars in All Her Fault?
All Her Fault features a cast led by Sarah Snook, Dakota Fanning, Michael Peña, and Jake Lacy in a mystery thriller that premiered on Peacock in November 2025. The supporting cast includes Sophia Lillis, Jay Ellis, Abby Elliott, and Thomas Cocquerel. The series has not been renewed and was produced as a miniseries. For readers interested in other cast lineups in the crime and mystery genre, see the Cast of Red Riding – Actors and Roles in 1974, 1980, 1983 and The Gold Series 2 Cast – Returning Stars and New Faces.
Frequently Asked Questions
Is All Her Fault a true story?
The series is based on a novel by Andrea Mara and is a work of fiction. It uses realistic domestic thriller elements but is not directly based on real events.
Will there be an All Her Fault season 2?
No official announcement has been made. The series was produced and marketed as a limited miniseries, but future seasons remain possible depending on viewership.
Who plays Esther in All Her Fault?
According to available casting details, the role of Esther is played by Abby Elliott. She portrays Lia Irvine in the series.
Where can I watch All Her Fault?
All Her Fault premiered on Peacock in the United States on November 6, 2025. International availability on other platforms has not been confirmed.
How many episodes are in All Her Fault?
The miniseries consists of six to eight episodes, all released simultaneously on Peacock. The exact episode count depends on the source consulted.
Who directed All Her Fault?
Minkie Spiro and Kate Dennis directed episodes of the series. Spiro also served as an executive producer.
Is All Her Fault on Netflix?
No. The series is not available on Netflix. It premiered exclusively on Peacock in the United States.
Who wrote All Her Fault?
The series was written by Megan Gallagher, who adapted Andrea Mara’s novel. Mara also served as an executive producer on the project.
Oliver Arthur Morgan Harrison is a staff writer for StoryShift.uk, covering UK news, culture, politics and technology. He works under Editor-in-Chief Maarika Tamm and UK Managing Editor Oliver Grant, following the newsroom standards for sourcing, verification and fact-checking set out in our editorial policies.